Whip-roll motion for looms.



No. 743,722.- PATENTED Nov; 10 1903.

W. HOLGROFT. WHIP ROLL MOTION FOR LOOMS.

APPLICATION FILED JAN. 9. 1903.

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UNITED STATES Patented November 10, 1903.

PATENT 'rrrcn.

WHIP-R0 LL fMoTi'oN FOR LOOMS.

3*?EGIFICATICN forming part of Letters Patent No. 743,722, datedNovember 10, 1903.

Applicat on filed January 9; 1903 7 Serial No. 138,860. (No model.) I vTo all whom it may concern:

have invented certain new and useful Improvements in WVhip-Roll Motionsfor Looms, of which the following is a specification.

My invention relates to improvements in. looms; and the object of myinvention is to which are pivo tally secured to the frame of the loom,and I furnish means, driven, preferably, from the main shaft of theloom, which rock said arms and whiproller inward or toward the heddlesduring the opening of the shed and outward or away from the heddlesduring the closing of the shed in order to relieve dles are at rest andthe shed fully opened for the passage of the shuttle or fully closed andthe lay operating to beat up the fell.

In the accompanying drawings, forming part of this specification, and inwhich similar letters of reference indicate similar parts throughoutboth views, Figure 1 is a diagram-' matic sectional side elevation of aloom embodying my improvements; Fig. 2, a front elevation of thewhip-roller.

a is the frame of the loom; b, the lay; c, the yarn-beam; d, thecloth-beam; f g, the heddles; 72/, the main shaft, which drivesconnecting-rod i, which operates the lay. All of these parts are of theusual construction.

3' is the whip-roller, which is carried in suitable bearings in theupper ends of arms k, which are pivoted at Z to the front of the frame aand the lower ends of which are connected to the upper end of a rod orrods m, the lower end or ends of which are connected to an arm or armsa, one end of which is pivotally connected to a stationary point 0 and i"the other end of which is adapted to be oper- Be it known that I,WILLLAM HOLOROFT, a; citizen of the United States, and a residentj ofChester, Delaware county, Pennsylvania,

ated by a cam 11, which is carried by shaft r. The-shaft r carries agear-wheel s, the pitchcircle of which is indicated by a dotted line,which is driven by a gear-wheel it, also indicated by a dottedpitch-circle, which is carried by the main shaft h. The gears s and tare so proportioned that the former makes one complete revolution, toevery two complete revolutions of the latter. The cam 13 is soconstructed that it depresses the free end of arm n as the shed isclosing, causing during this closing the arm m to move downthe lowerends of arms in, which moves out the upper ends of these arms and thewhip-roller j, which latter thus in creases the tension upon thewarp-threads. During the time that the shed is closed the layb isoperated to beat up the fell, and during this movement the cam 19 doesnot move the whip-roller. As soon as the fell is beaten up the shedcommences to open, and at this instant the cam 1) permits the end of armn to move upward through arms m and n to cause the whip-roller to moveinward to decrease the tension of the warpthreads to the same degreethat it is increased .by the stretching due to the opening of the shed.The cam 10 is so shaped that when the roller 3' is all the way in andthe shed'fully opened for the passage of the shuttle, during which timethe heddles are at rest, the arm n and connected parts are at rest untilthe heddles commence to move, to close the shed, at which instant'thecam p commences to move the arm n to cause the roller to move outward. V

The free end of arm 91 preferably carries a friction-roller u, whichengages cam 19, and the arms m a are adjustably secured together so thatthe throw of the roller ;i may be adjusted. For this purpose the arm mis furnished with a slot 1; and the arm n with a slot to, a thumb-nutand bolt xpassing through the slots serving to secure the two armstogether. If necessary, a spring y may be employed to hold the arm n incontact with cam p.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination in a loom, of a whip rollerextending across said loom over which the warp-threads pass, armspivoted to the frame of the loom in the upper ends of Which said rolleris journaled, an arm connected to the lower ends of said arms, an armpivotally secured at one end to which said arm is secured, a cam drivenfrom the main shaft of the loom engaging the free end of said arm, andadapted to intermittently raise and lower the free end of said arm toimpart an intermittent reciprocating movement to said whiproller andsaid main shaft.

2. The combination in a loom, of a Whiproller extending across saidloom, over which the Warp-threads pass, arms pivoted to the frame of theloom in the upper ends of which said roller is journaled, an armconnected to the lower ends of said arms, an arm pivotally secured atone end to which said arm is adj ustably secured, a cam driven from themain shaft of the 100m adapted to intermittently raise and lower thefree end of said arm to impart an intermittent reciprocating movement tosaid whip-roller and said main shaft.

3. The combination in a loom, of a Whiproller extending across said loomover which the Warp-threads pass, arms pivoted to the frame of said loomin which said Whip-roller is journaled, a cam driven from the main shaftof the loom, and a connection between said cam and saidwhip-roller-carrying arms, said cam being adapted to intermittentlyreciprocate said arms and roller.

4. The combination in a loom of a Whiproller extending across said loom,over which the warp-threads pass, arms pivoted to the frame of said loomin which said Whip-roller is j ournaled, a cam driven from the mainshaft of the loom, and adapted to make one revolution to each tworevolutions of said main shaft, and means for connecting said cam androllercarrying arms, said cam being adapted, through said connectingmeans, to cause said arms and whip-roller to reciprocate intermittently.

XVILLIAM l-IOLCROFT.

